Entanglement and the quantum-to-classical transition

被引：13

作者：

Ghose, S ^{[1
]}

Alsing, PM

Sanders, BC

Deutsch, IH

机构：

[1] Univ Calgary, Inst Quantum Informat Sci, Calgary, AB T2N 1N4, Canada

[2] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA

来源：

PHYSICAL REVIEW A | 2005年 / 72卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.72.014102

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We analyze the quantum-to-classical transition (QCT) for coupled bipartite quantum systems for which the position of one of the two subsystems is continuously monitored. We obtain the surprising result that the QCT can emerge concomitantly with the presence of highly entangled states in the bipartite system. Furthermore, the changing degree of entanglement is associated with the backaction of the measurement on the system and is itself an indicator of the QCT. Our analysis elucidates the role of entanglement in von Neumann's paradigm of quantum measurements comprised of a system and a monitored measurement apparatus.

引用

页数：4

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